Permalinks on Windows IIS not working and web.config breaks site – does wordpress not support windows server now, if so how?

Download IIS Rewrite from https://www.iis.net/downloads/microsoft/url-rewrite.
Install and restart IIS

Then modify the web.config
Edit web.config, add the rewrite code.

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <defaultDocument>
            <files>
                <add value="index.php" />
            </files>
        </defaultDocument>

        <rewrite>
            <rules>
                <rule name="Main Rule" stopProcessing="true">
                    <match url=".*" />
                    <conditions logicalGrouping="MatchAll">
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    </conditions>
                    <action type="Rewrite" url="index.php" />
                </rule>
            </rules>
        </rewrite>

    </system.webServer>
</configuration>